Are there any CAD system that combine code-CAD and more traditional sketch based CAD, like OnShape, Solidworks etc?

This could use a (2015) label :)

I've been tapering off maintenance since 2016 or so, but it has a more actively-maintained fork over at https://github.com/nsfm/stibium (albeit with heavy LLM assistance, because it's 2026!)

YMMV – I haven't used it or closely inspected the changes, but have corresponded with the author, who seems genuinely dedicated in the success of the project.

How would one apply a fillet to an edge, in this model?

I haven't really used the constructive geometry approaches to CAD, but I've been learning CAD recently through OnShape, and really appreciated how easy were all the operations I wanted to do with it. I've heard that the purely constructive geometry approaches of the OpenSCAD type can make certain operations more complicated to implement.

This probably merits noting that the whole Code CAD thing is getting pushed very hard lately with many new AI-driven projects.

I will note the following projects which have made recent advancements:

- OpenSCAD --- the hopefully final Release Candidate for the long-awaited update is now available: https://openscad.org/downloads.html#rc

- PythonSCAD --- for folks who want variables which change and so forth: https://www.pythonscad.org/

- CADquery --- https://cadquery.github.io/

- Build123D --- https://github.com/gumyr/build123d

Longer list/discussion at: https://github.com/Irev-Dev/curated-code-cad

Also, a more recent project by Matt Keeter, Halfspace was announced recently but didn't get much discussion here:

https://news.ycombinator.com/item?id=49881890

To anyone else who had to parse early KiCad file formats, where the parentheses and quoting on S-expressions was more of a guideline than a rule, I salute you.

I was all ready to say how useless code-based CAD usually is (like OpenSCAD), but this actually looks pretty sick.

If you could add support for SolveSpace's 2D sketcher, and also bevels/fillets, then this might actually be useful.